JPS5854376A - Color developing indication laminated panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a color display laminated panel that develops color when irradiated with light, and more specifically, a synthetic resin plate and a glass plate that have different absorptions of ultraviolet rays, to which a coloring material that develops color when irradiated with ultraviolet rays is added. , or a color display laminated panel bonded via a bonded adhesive layer.

Conventionally, color display panels have been used for signboards, road signs, etc., which are made by mixing a fluorescent agent with paint and coating it on a metal plate or paper.

However, in such a color display panel, when light is irradiated from the surface coated with paint, the coloring state of the fluorescent agent can only be observed from that surface.

In the present invention, a synthetic resin plate and a glass plate are bonded via an adhesive layer containing a coloring material that develops color when irradiated with ultraviolet rays, and selectively uses the difference in ultraviolet transmittance between the synthetic resin plate and the glass plate. Provided is a color display panel that displays colors.

That is, the present invention provides a laminated panel in which a transparent or colored transparent synthetic resin plate with different absorption of ultraviolet rays and a transparent or colored transparent glass plate are bonded via an adhesive layer, in which the adhesive layer is irradiated with ultraviolet rays. This is a color display laminated panel that is characterized by adding or bonding a coloring material that develops color, and develops color when exposed to light that passes through the glass plate, but does not develop color when exposed to light that passes through the synthetic resin plate.

According to the present invention, a coloring material is added to or bonded to the adhesive layer between a transparent or colored transparent synthetic resin plate that absorbs a large amount of ultraviolet rays and a transparent or colored glass plate that absorbs only a small amount of ultraviolet rays. Therefore, when ultraviolet rays or light rays containing ultraviolet rays (hereinafter referred to as light) are irradiated from the glass plate side, a colored image can be observed from both sides of the laminated panel, and when light is irradiated from the synthetic resin plate side, a colored image can be observed. Can not. According to the present invention, since the coloring material and adhesive layer, and in some cases the synthetic resin plate, are sandwiched between glass plates, it is possible to obtain a highly durable coloring display laminated panel that is not adversely affected by moisture or light. I can do it.

Furthermore, a transparent or colored transparent glass plate is bonded to the outer surface of the synthetic resin plate of the coloring panel of the present invention through an adhesive layer to which a coloring material that develops color when exposed to ultraviolet rays is added or bonded, thereby producing a color display laminated panel. can do. In this case, when light is irradiated from one side of the flannel panel, only the colored image of the coloring material on the light incident side can be observed from both sides of the laminated panel, compared to the synthetic resin plate. When light is irradiated from the other side of the synthetic resin plate,
Only the colored image of the coloring material on the light incident side can be observed from both sides of the laminated panel. Therefore, there are two types of characters, patterns,
It can display pictures, figures, etc. (hereinafter referred to as characters, etc.), display different characters, etc. by changing the direction of light irradiation, and display characters, etc. by not irradiating light. It can be done without.

In addition, in the present invention, it is preferable to use a transparent or colored transparent synthetic resin plate that absorbs ultraviolet rays with a wavelength shorter than J70 nm, such as polycarbonate resin, acrylic resin; vinyl chloride resin, polystyrene. A resin selected from resins, polyester resins, and cellulose resins having a thickness of Q, jmm to /□mm-, preferably /mm to Smm, is used.

In particular, polycarbonate has a high resistance to conduction, and as shown as P in Figure 1, a 2mm thick one has a resistance of 370nm.
It has a high transmittance for light rays with wavelengths longer than m, and absorbs light rays with short wavelengths of J90 nm or less by SO% or more, so it is suitable as a plastic plate for the color display panel of the present invention.

Furthermore, in the present invention, as the transparent or colored transparent glass plate with low absorption of ultraviolet rays, a glass plate having a normal plate glass composition is used, and the thickness is 9.3 mm to j mm, preferably Q, j; mm to /, Qmm is used. In particular, as shown as G in Fig. 1, a 7 mm thick glass plate with a normal plate glass composition has a thickness of 323 nm to 31 rOn.
Since it transmits ultraviolet rays in the range of 59% or more, it is suitable as a glass plate for the color display laminated panel of the present invention.

Furthermore, the present invention uses stilbene-based, oxazole-based, lyazole-based, and coumarin-based materials that are colorless and transparent or colorless when not irradiated with light and develop blue, green, or red colors when irradiated with light, as color-forming materials that develop color with ultraviolet rays. and naphthalimide-based fluorescent agents, as well as photochromic substances of spiropyran, triarylmethane fluoride, and polycyclic aromatic hydrogen.

Furthermore, the present invention provides an adhesive layer that does not interfere with the coloring function of the coloring material, adheres to synthetic resin plates and glass plates, and has transparency, water resistance, and weather resistance. Excellent adhesives are used, such as ethylene/vinyl acetate copolymer resin, ethylene acrylate copolymer resin, polyester resin, polyisobutylene resin, polyvinyl butyral resin, vinyl acetate resin, acrylate ester resin, polyurethane resin, and polyamide resin. thermoplastic resins such as thermoplastic resins, or resins with tackifier added to these resins,
In addition, agents such as epoxy resin, photopolymerized acrylic resin, siligene resin, and polyurethane resin are preferably used.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1 The surfaces of r glass plates /, 71 with a size of 'tomm x somm x 7 mm were cleaned with alcohol, and a sheet-like ethylene vinyl acetate copolymer resin having a thickness of tottm was adhered to one surface of each glass plate /, //. A sample to which Layer-2t was attached was prepared. On the other hand, a commercially available fluorescent brightener (C, 1, Fl
uorescent Brightener sr＞
(Sumitomo Chemical Co., Ltd. Product name: White Flu
or B) dissolved in toluene was prepared, and a letter A was drawn on the adhesive layer 21 and a letter B was drawn on the adhesive layer 21 with a brush and left for several hours. Furthermore, the size is 7'omm x
Prepare a polycarbonate resin plate 3 of somm x Jmm, and attach glass plates /, /l having adhesive layers KO, 2/ on which the letters A and B are drawn on both sides of the polycarbonate resin plate 3, and apply this with a rubber roll. After temporary gluing, za 0
The transparent color display laminated panel l shown in FIGS. 2, 3, and 4 was manufactured by autoclaving with 'C1/OKg/Cm'. The resulting color display laminated panel becomes colorless and transparent when not irradiated with light, and when irradiated with light from a mercury lamp or xenon lamp from the adhesive layer side of the panel, the blue letter A appears from both sides of the panel, indicating that the adhesive layer of the panel −
When irradiated from 1, the blue letter B was visible from both sides of the panel, and when both sides of the panel were further irradiated with the light, the blue letters A and B appeared to overlap from both sides of the panel.

Example 2 In the same manner as in Example 1, a glass plate 1 with an adhesive layer with the letter A drawn on it and a polycarbonate resin plate 3 were prepared and bonded to each other to produce the color shown in Figure S. Display panel 17
/ was produced. The resulting color-forming display layer panel becomes colorless and transparent when not irradiated with light, and when irradiated with light from a mercury lamp or xenon lamp from the glass plate side, a blue letter A appears.
was visible from both sides of the panel, and when irradiated from the polycarbonate resin plate 3 side, it was colorless and transparent and nothing was visible.

[Brief explanation of the drawing]

The drawings show examples of the present invention, in which Figure 1 shows transmittance curves in the ultraviolet-visible region of a polycarbonate plate (Jam) and a glass plate (lWIm), and Figure 2 shows transmittance curves of the color display laminated panel of the present invention. 3 is a front view, FIG. 4 is a back view, and FIG. S is a sectional view of a color display laminated panel showing another embodiment. /, // Nigarasu plate, 2. ．． 21: Adhesive layer. , 3.31: Polycarbonate plate - skin length (nm) Figure 2 Figure 5 Figure 3 Figure 4

Claims (6)

[Claims] (1) In a laminated panel in which a transparent or colored transparent synthetic resin plate with different absorption of ultraviolet rays and a transparent or colored transparent glass plate are bonded via an adhesive layer, the adhesive layer develops color by irradiation with ultraviolet rays. 1. A color display laminated panel that is characterized by adding or bonding a color-forming material to the glass plate, which develops color when exposed to light that passes through the glass plate, but does not develop color when exposed to light that passes through the synthetic resin plate. (2) Color development according to claim 1, in which a transparent or colored transparent glass plate is bonded to the outer surface of the synthetic resin plate through an adhesive layer to which a coloring material that develops color when exposed to ultraviolet rays is added or bonded. Display laminated panel. (3) Claim 1 or 2, wherein the synthetic resin plate is a type of synthetic resin plate selected from polycarbonate resin, acrylic resin, vinyl chloride resin, polystyrene resin, polyester resin, and cellulose resin. Color display laminated panel as described. (4) The coloring material is stilbene-based or oxazole-based. Claim 1 is one or more fluorescent agents selected from triazole type, coumarin type, and naphthalimide type.
The color display laminated panel according to any one of items 1 to 3. (5) Any one of claims 1 to 3, wherein the color-forming material is one or more 7 otochromic substances selected from spiropyran, triacoolmethane-based leuco derivatives, and condensed polycyclic aromatic hydrocarbons. Color display laminated panel as described. (6) The adhesive layer is ethylene vinyl acetate copolymer resin, ethylene acrylate copolymer resin, polyester resin, polyisobutylene resin, vinyl acetate butyral resin,
Thermoplastic resins such as vinyl acetate resins, acrylic ester resins, polyurethane resins, and polyamide resins, and resins obtained by adding tackifiers to these resins, as well as epoxy resins, photopolymerized acrylic resins, silicone resins, and urethane resins. The color display laminated panel according to claim 1, which is one or more resins selected from transparent or colored transparent adhesives made of curable resins such as.